Global Patent Index - EP 0542154 A3

EP 0542154 A3 19930630 - METHOD FOR THE SEARCH OF MOTION VECTORS FOR A VIDEO SIGNAL

Title (en)

METHOD FOR THE SEARCH OF MOTION VECTORS FOR A VIDEO SIGNAL

Publication

EP 0542154 A3 19930630 (EN)

Application

EP 92119057 A 19921106

Priority

FI 915308 A 19911111

Abstract (en)

[origin: EP0542154A2] The invention relates to a method for the search of a motion vector (MV) for a video signal in hybrid coding where the temporal redundancy of the image is removed by DPCM prediction and a resulting prediction error is converted by a transform operation into transform-domain coefficients and transmitted to a decoder in the form of coefficients. To avoid the problems caused in hybrid coding by motion vectors found by the commonly used block matching method, a first operation approximating the transform of the actual hybrid encoder is applied (35) to a difference image produced by an image block corresponding to a motion vector candidate to be tested in the search of the motion vectors, and the coefficients produced by said operation are used to approximate a number of bits required to code the transform coefficients, and a block minimizing said number of bits is selected from within a selected motion vector search area as the prediction block. <IMAGE>

IPC 1-7

H04N 5/14

IPC 8 full level

H04N 5/14 (2006.01); H04N 7/26 (2006.01); H04N 7/50 (2006.01)

CPC (source: EP)

H04N 5/145 (2013.01); H04N 19/51 (2014.11); H04N 19/567 (2014.11); H04N 19/61 (2014.11)

Citation (search report)

  • [A] SIGNAL PROCESSING. IMAGE COMMUNICATION vol. 2, no. 2, August 1990, AMSTERDAM NL pages 155 - 169 PEREIRA 'A CCITT COMPATIBLE CODING ALGORITHM FOR DIGITAL RECORDING OF MOVING IMAGES'
  • [A] IEEE TRANSACTIONS ON BROADCASTING vol. 36, no. 4, December 1990, NEW YORK US pages 245 - 254 PAIK 'DIGICIPHER-ALL DIGITAL,CHANNEL COMPATIBLE,HDTV BROADCAST SYSTEM'

Designated contracting state (EPC)

DE ES FR GB IT NL SE

DOCDB simple family (publication)

EP 0542154 A2 19930519; EP 0542154 A3 19930630; FI 89441 B 19930615; FI 89441 C 19930927; FI 915308 A0 19911111

DOCDB simple family (application)

EP 92119057 A 19921106; FI 915308 A 19911111